Medicine: Capsules, Feb. 8, 1960

¶ After 14 years of negative results, despite the willingness of 6,000
human volunteers to catch cold for science, workers at Britain's famed
Common Cold Research Unit (TIME, Sept. 21, 1953) reported that they
have isolated what appears to be three strains of common cold virus.
They will not grow under the conditions favored by most viruses, but
need a cooler and more acid medium (like the lining of human nasal
passages). The strains are so choosy that some nourish only in cells
from embryonic human kidneysin which others will not grow at all.
Upshot: there are probably so many different...